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  1. #1
    Join Date
    Sep 2012
    Posts
    4

    Default cylinder age limit

    hello everyone! first post here so i want to make it a good one.
    ive been welding about 8-10 years now and i havent thought about it, are there age limits on high pressure (2000-2500 psi) cylinders? im asking because my father brought it up when i was talking about the tank my grandfather gave me. its a 250cf tank from 1936... yeah 1936 and i got it tested and filled in 2012.

    also, whats a good portable, easy to handle tank size for a dynasty 200 for moderate use? i was thinking 125cf but i can only purchase 80cf tanks here in ma

    thanks everyone! hopefully ill be able to have some input on others posts

  2. #2
    Join Date
    Sep 2005
    Location
    Salem ,Ohio
    Posts
    3,936

    Cool

    99 years i think...Bob
    Bob Wright, Grandson of Tee Nee Boat Trailer Founder
    Metal Master Fab Salem, Oh 44460
    Birthplace of the Silver & Deming Drill
    1999 MM185 w/185 Spoolgun,1986 Thunderbolt AC/DC
    Spool Gun conversion. How To Do It. Below.
    http://www.millerwelds.com/resources...php?albumid=48

  3. #3
    Join Date
    Apr 2012
    Location
    Western Pa.
    Posts
    292

    Default cylinder age limit

    Yep see lots from early 1900s still in use. Local LWS told me they just got rid of some they found from late 1800s. That's scary.

  4. #4
    Join Date
    Dec 2010
    Location
    Andover, Ohio
    Posts
    130

    Default

    Welcome to the forum.

  5. #5
    Join Date
    Nov 2003
    Posts
    3,429

    Smile Periodically Tested For Safety

    Quote Originally Posted by nedge46 View Post
    hello everyone! first post here so i want to make it a good one.
    ive been welding about 8-10 years now and i havent thought about it, are there age limits on high pressure (2000-2500 psi) cylinders? im asking because my father brought it up when i was talking about the tank my grandfather gave me. its a 250cf tank from 1936... yeah 1936 and i got it tested and filled in 2012.

    also, whats a good portable, easy to handle tank size for a dynasty 200 for moderate use? i was thinking 125cf but i can only purchase 80cf tanks here in ma

    thanks everyone! hopefully ill be able to have some input on others posts
    Some of the answers you got might be humorous but a little scary....
    Highly doubtful you would ever see a 99 year old bottle....

    For Safety's Sake DOT requires gas bottles to be periodically inspected and HYDROSTATICALLY Tested... Typically every 3 to 5 years.. here is some info on that..

    Hydrostatic testing FAQ

    The Department of Transportation (DOT) requires all cylinders to be hydrostatically tested every 3, 5, or 10 years. The time allowed by law is determined by a variety of factors such as the type of material, the gas it contains, its age, and special permits the cylinder may have been manufactured under. What is a hydrostatic test?
    A “hydro test” is an approved way to test the structural integrity of a compressed gas container. It is performed by removing the valve, filling the container with water, and then pressuring the container above its operating limit. The expansion of the cylinder is measured, recorded, and analyzed. If cylinder expands beyond certain limits, the cylinder must be condemned.

    In most cases corrosion or other damage, internal or external, will render a cylinder useless before a failed hydrostatic test.

    How often is a hydro test required?

    This depends on the rating of the cylinder and the date it was last tested. The month and year of each hydro test is stamped onto the cylinder between a letter and four numbers identifying the tester. It is 3, 5, or 10 years from this date that the next hydro test is due.

    All cylinders have ratings that start with “DOT” or “ICC,” followed by the service pressure of the container. For example “DOT 3AA 1800” means a DOT approved cylinder made to the “3AA” specification rated for 1800 psi. Some common ratings and test intervals are below:5-Year test:
    DOT 3A
    ICC 3A
    DOT 3AA
    ICC 3AA
    DOT 3AL


    3-Year test:
    DOT 3HT


    10-Year test:
    DOT 3AA with a “star” following the last hydro test date.


    Some cylinders have a 5-point star stamped into the cylinder after the last hydro test date making them eligible for a 10-year test under certain circumstances.


    Various:
    DOT E
    DOT SP

    These are specialty cylinders that fall within a range of testing requirements and are manufactured and tested with “special permits” from the DOT.


    What happens if the cylinder fails?
    In the unlikely circumstance that the cylinder fails the hydro test, a test report will be given to the customer and the cylinder must be destroyed.


    http://www.compressedgassystems.com/compressed-gas-systems/hydrostatic-testing-faq.html


    Here is a link to the DOT REGS for gas bottles...

    http://www.c-f-c.com/gaslink/docs/dot_cylinder.htm
    .

    *******************************************
    The more you know, The better you know, How little you know......

    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

    My Blue Stuff:
    Dynasty 350DX Tigrunner
    Dynasty 200DX
    Millermatic 350P w/25ft Alumapro & 30A
    Millermatic 200

    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam..

  6. #6
    Join Date
    Oct 2006
    Location
    Illinois
    Posts
    622

    Default

    There was a post on weldingweb site about tanks from 1900's that are in service.

  7. #7
    Join Date
    Nov 2003
    Posts
    3,429

    Default

    Quote Originally Posted by BD1 View Post
    There was a post on weldingweb site about tanks from 1900's that are in service.
    Would guess that most of the oldest ones have suffered from some sort of atrition or failed HYDRO...
    The oldest that I can recall seeing was 1942...

    In any event ... no reputable gas dealer would refill a bottle that was not within current HYDRO test specs...regardless of its age....
    Last edited by H80N; 02-10-2015 at 02:12 PM.
    .

    *******************************************
    The more you know, The better you know, How little you know......

    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

    My Blue Stuff:
    Dynasty 350DX Tigrunner
    Dynasty 200DX
    Millermatic 350P w/25ft Alumapro & 30A
    Millermatic 200

    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam..

  8. #8
    Join Date
    Dec 2007
    Location
    Los Angeles
    Posts
    2,913

    Default

    Ed Conley
    http://www.screamingbroccoli.net/
    MM252
    MM211
    Passport Plus w/Spool Gun
    TA185
    Miller 125c Plasma 120v
    O/A set
    SO 2020 Bender
    You can call me Bacchus

  9. #9

    Default

    DOT says cylinders must be taken out of service after 99 years regardless of testing, or at least that was the reg a few years ago. I've had a 1912 owner bottle, around '03 or so.

    J
    Some days you eat the bear. And some days the bear eats you.

  10. #10
    Join Date
    Sep 2005
    Location
    Salem ,Ohio
    Posts
    3,936

    Cool

    The place where i weld uses Airgas for their gasses. I saw 1913 bottles in 2011 when i started there. Now i see 1917 1918 almost weekly. Not on the large oxygen but on the smaller C02 which i think were oxygen bottles years ago and they were demoted to lower pressure cylinders. The coolest bottle i saw was a Ford Motor Company stamped bottle but Airgas must have bought them up too. Seems like they buy out all the smaller gas companies...Bob
    Bob Wright, Grandson of Tee Nee Boat Trailer Founder
    Metal Master Fab Salem, Oh 44460
    Birthplace of the Silver & Deming Drill
    1999 MM185 w/185 Spoolgun,1986 Thunderbolt AC/DC
    Spool Gun conversion. How To Do It. Below.
    http://www.millerwelds.com/resources...php?albumid=48

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